mcs/mcs/reflection.cs

   1 //
   2 // reflection.cs: System.Reflection and System.Reflection.Emit specific implementations
   3 //
   4 // Author: Marek Safar (marek.safar@gmail.com)
   5 //
   6 // Dual licensed under the terms of the MIT X11 or GNU GPL
   7 //
   8 // Copyright 2009-2010 Novell, Inc.
   9 //
  10 //
  11
  12 using System;
  13 using System.Collections.Generic;
  14 using System.Reflection;
  15 using System.IO;
  16 using System.Runtime.CompilerServices;
  17 using System.Reflection.Emit;
  18 using System.Security;
  19
  20 namespace Mono.CSharp
  21 {
  22 #if STATIC
  23         public class ReflectionImporter
  24         {
  25                 public ReflectionImporter (BuildinTypes buildin)
  26                 {
  27                         throw new NotSupportedException ();
  28                 }
  29
  30                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  31                 {
  32                         throw new NotSupportedException ();
  33                 }
  34
  35                 public ImportedModuleDefinition ImportModule (Module module, RootNamespace targetNamespace)
  36                 {
  37                         throw new NotSupportedException ();
  38                 }
  39
  40                 public TypeSpec ImportType (Type type)
  41                 {
  42                         throw new NotSupportedException ();
  43                 }
  44         }
  45 #else
  46         public sealed class ReflectionImporter : MetadataImporter
  47         {
  48                 public ReflectionImporter (BuildinTypes buildin)
  49                 {
  50                         Initialize (buildin);
  51                 }
  52
  53                 protected override MemberKind DetermineKindFromBaseType (Type baseType)
  54                 {
  55                         if (baseType == typeof (ValueType))
  56                                 return MemberKind.Struct;
  57
  58                         if (baseType == typeof (System.Enum))
  59                                 return MemberKind.Enum;
  60
  61                         if (baseType == typeof (MulticastDelegate))
  62                                 return MemberKind.Delegate;
  63
  64                         return MemberKind.Class;
  65                 }
  66
  67                 public override void GetCustomAttributeTypeName (CustomAttributeData cad, out string typeNamespace, out string typeName)
  68                 {
  69                         var dt = cad.Constructor.DeclaringType;
  70                         typeNamespace = dt.Namespace;
  71                         typeName = dt.Name;
  72                 }
  73
  74                 protected override bool HasVolatileModifier (Type[] modifiers)
  75                 {
  76                         foreach (var t in modifiers) {
  77                                 if (t == typeof (IsVolatile))
  78                                         return true;
  79                         }
  80
  81                         return false;
  82                 }
  83
  84                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  85                 {
  86                         // It can be used more than once when importing same assembly
  87                         // into 2 or more global aliases
  88                         var definition = GetAssemblyDefinition (assembly);
  89
  90                         //
  91                         // This part tries to simulate loading of top-level
  92                         // types only, any missing dependencies are ignores here.
  93                         // Full error report is reported later when the type is
  94                         // actually used
  95                         //
  96                         Type[] all_types;
  97                         try {
  98                                 all_types = assembly.GetTypes ();
  99                         } catch (ReflectionTypeLoadException e) {
 100                                 all_types = e.Types;
 101                         }
 102
 103                         ImportTypes (all_types, targetNamespace, definition.HasExtensionMethod);
 104                 }
 105
 106                 public ImportedModuleDefinition ImportModule (Module module, RootNamespace targetNamespace)
 107                 {
 108                         var module_definition = new ImportedModuleDefinition (module, this);
 109                         module_definition.ReadAttributes ();
 110
 111                         Type[] all_types;
 112                         try {
 113                                 all_types = module.GetTypes ();
 114                         } catch (ReflectionTypeLoadException e) {
 115                                 all_types = e.Types;
 116                         }
 117
 118                         ImportTypes (all_types, targetNamespace, false);
 119
 120                         return module_definition;
 121                 }
 122
 123                 void Initialize (BuildinTypes buildin)
 124                 {
 125                         //
 126                         // Setup mapping for build-in types to avoid duplication of their definition
 127                         //
 128                         buildin_types.Add (typeof (object), buildin.Object);
 129                         buildin_types.Add (typeof (System.ValueType), buildin.ValueType);
 130                         buildin_types.Add (typeof (System.Attribute), buildin.Attribute);
 131
 132                         buildin_types.Add (typeof (int), buildin.Int);
 133                         buildin_types.Add (typeof (long), buildin.Long);
 134                         buildin_types.Add (typeof (uint), buildin.UInt);
 135                         buildin_types.Add (typeof (ulong), buildin.ULong);
 136                         buildin_types.Add (typeof (byte), buildin.Byte);
 137                         buildin_types.Add (typeof (sbyte), buildin.SByte);
 138                         buildin_types.Add (typeof (short), buildin.Short);
 139                         buildin_types.Add (typeof (ushort), buildin.UShort);
 140
 141                         buildin_types.Add (typeof (System.Collections.IEnumerator), buildin.IEnumerator);
 142                         buildin_types.Add (typeof (System.Collections.IEnumerable), buildin.IEnumerable);
 143                         buildin_types.Add (typeof (System.IDisposable), buildin.IDisposable);
 144
 145                         buildin_types.Add (typeof (char), buildin.Char);
 146                         buildin_types.Add (typeof (string), buildin.String);
 147                         buildin_types.Add (typeof (float), buildin.Float);
 148                         buildin_types.Add (typeof (double), buildin.Double);
 149                         buildin_types.Add (typeof (decimal), buildin.Decimal);
 150                         buildin_types.Add (typeof (bool), buildin.Bool);
 151                         buildin_types.Add (typeof (System.IntPtr), buildin.IntPtr);
 152                         buildin_types.Add (typeof (System.UIntPtr), buildin.UIntPtr);
 153
 154                         buildin_types.Add (typeof (System.MulticastDelegate), buildin.MulticastDelegate);
 155                         buildin_types.Add (typeof (System.Delegate), buildin.Delegate);
 156                         buildin_types.Add (typeof (System.Enum), buildin.Enum);
 157                         buildin_types.Add (typeof (System.Array), buildin.Array);
 158                         buildin_types.Add (typeof (void), buildin.Void);
 159                         buildin_types.Add (typeof (System.Type), buildin.Type);
 160                         buildin_types.Add (typeof (System.Exception), buildin.Exception);
 161                         buildin_types.Add (typeof (System.RuntimeFieldHandle), buildin.RuntimeFieldHandle);
 162                         buildin_types.Add (typeof (System.RuntimeTypeHandle), buildin.RuntimeTypeHandle);
 163                 }
 164         }
 165
 166 #endif
 167
 168         public class AssemblyDefinitionDynamic : AssemblyDefinition
 169         {
 170                 //
 171                 // In-memory only assembly container
 172                 //
 173                 public AssemblyDefinitionDynamic (ModuleContainer module, string name)
 174                         : base (module, name)
 175                 {
 176                 }
 177
 178                 //
 179                 // Assembly container with file output
 180                 //
 181                 public AssemblyDefinitionDynamic (ModuleContainer module, string name, string fileName)
 182                         : base (module, name, fileName)
 183                 {
 184                 }
 185
 186                 public Module IncludeModule (string moduleFile)
 187                 {
 188                         return builder_extra.AddModule (moduleFile);
 189                 }
 190
 191 #if !STATIC
 192                 public override ModuleBuilder CreateModuleBuilder ()
 193                 {
 194                         if (file_name == null)
 195                                 return Builder.DefineDynamicModule (Name, false);
 196
 197                         return base.CreateModuleBuilder ();
 198                 }
 199 #endif
 200                 //
 201                 // Initializes the code generator
 202                 //
 203                 public bool Create (AppDomain domain, AssemblyBuilderAccess access)
 204                 {
 205 #if STATIC
 206                         throw new NotSupportedException ();
 207 #else
 208                         ResolveAssemblySecurityAttributes ();
 209                         var an = CreateAssemblyName ();
 210
 211                         try {
 212                                 Builder = file_name == null ?
 213                                         domain.DefineDynamicAssembly (an, access) :
 214                                         domain.DefineDynamicAssembly (an, access, Dirname (file_name));
 215                         } catch (ArgumentException) {
 216                                 // specified key may not be exportable outside it's container
 217                                 if (RootContext.StrongNameKeyContainer != null) {
 218                                         Report.Error (1548, "Could not access the key inside the container `" +
 219                                                 RootContext.StrongNameKeyContainer + "'.");
 220                                 }
 221                                 throw;
 222                         }
 223
 224                         builder_extra = new AssemblyBuilderMonoSpecific (Builder, Compiler);
 225                         return true;
 226 #endif
 227                 }
 228
 229                 static string Dirname (string name)
 230                 {
 231                         int pos = name.LastIndexOf ('/');
 232
 233                         if (pos != -1)
 234                                 return name.Substring (0, pos);
 235
 236                         pos = name.LastIndexOf ('\\');
 237                         if (pos != -1)
 238                                 return name.Substring (0, pos);
 239
 240                         return ".";
 241                 }
 242
 243 #if !STATIC
 244                 protected override void SaveModule (PortableExecutableKinds pekind, ImageFileMachine machine)
 245                 {
 246                         try {
 247                                 var module_only = typeof (AssemblyBuilder).GetProperty ("IsModuleOnly", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
 248                                 var set_module_only = module_only.GetSetMethod (true);
 249
 250                                 set_module_only.Invoke (Builder, new object[] { true });
 251                         } catch {
 252                                 base.SaveModule (pekind, machine);
 253                         }
 254
 255                         Builder.Save (file_name, pekind, machine);
 256                 }
 257 #endif
 258         }
 259
 260         //
 261         // Extension to System.Reflection.Emit.AssemblyBuilder to have fully compatible
 262         // compiler
 263         //
 264         class AssemblyBuilderMonoSpecific : AssemblyBuilderExtension
 265         {
 266                 static MethodInfo adder_method;
 267                 static MethodInfo add_permission;
 268                 static MethodInfo add_type_forwarder;
 269                 static MethodInfo win32_icon_define;
 270                 static FieldInfo assembly_version;
 271                 static FieldInfo assembly_algorithm;
 272                 static FieldInfo assembly_culture;
 273                 static FieldInfo assembly_flags;
 274
 275                 AssemblyBuilder builder;
 276
 277                 public AssemblyBuilderMonoSpecific (AssemblyBuilder ab, CompilerContext ctx)
 278                         : base (ctx)
 279                 {
 280                         this.builder = ab;
 281                 }
 282
 283                 public override Module AddModule (string module)
 284                 {
 285                         try {
 286                                 if (adder_method == null)
 287                                         adder_method = typeof (AssemblyBuilder).GetMethod ("AddModule", BindingFlags.Instance | BindingFlags.NonPublic);
 288
 289                                 return (Module) adder_method.Invoke (builder, new object[] { module });
 290                         } catch {
 291                                 return base.AddModule (module);
 292                         }
 293                 }
 294
 295                 public override void AddPermissionRequests (PermissionSet[] permissions)
 296                 {
 297                         try {
 298                                 if (add_permission == null)
 299                                         add_permission = typeof (AssemblyBuilder).GetMethod ("AddPermissionRequests", BindingFlags.Instance | BindingFlags.NonPublic);
 300
 301                                 add_permission.Invoke (builder, permissions);
 302                         } catch {
 303                                 base.AddPermissionRequests (permissions);
 304                         }
 305                 }
 306
 307                 public override void AddTypeForwarder (TypeSpec type, Location loc)
 308                 {
 309                         try {
 310                                 if (add_type_forwarder == null) {
 311                                         add_type_forwarder = typeof (AssemblyBuilder).GetMethod ("AddTypeForwarder", BindingFlags.NonPublic | BindingFlags.Instance);
 312                                 }
 313
 314                                 add_type_forwarder.Invoke (builder, new object[] { type.GetMetaInfo () });
 315                         } catch {
 316                                 base.AddTypeForwarder (type, loc);
 317                         }
 318                 }
 319
 320                 public override void DefineWin32IconResource (string fileName)
 321                 {
 322                         try {
 323                                 if (win32_icon_define == null)
 324                                         win32_icon_define = typeof (AssemblyBuilder).GetMethod ("DefineIconResource", BindingFlags.Instance | BindingFlags.NonPublic);
 325
 326                                 win32_icon_define.Invoke (builder, new object[] { fileName });
 327                         } catch {
 328                                 base.DefineWin32IconResource (fileName);
 329                         }
 330                 }
 331
 332                 public override void SetAlgorithmId (uint value, Location loc)
 333                 {
 334                         try {
 335                                 if (assembly_algorithm == null)
 336                                         assembly_algorithm = typeof (AssemblyBuilder).GetField ("algid", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 337
 338                                 assembly_algorithm.SetValue (builder, value);
 339                         } catch {
 340                                 base.SetAlgorithmId (value, loc);
 341                         }
 342                 }
 343
 344                 public override void SetCulture (string culture, Location loc)
 345                 {
 346                         try {
 347                                 if (assembly_culture == null)
 348                                         assembly_culture = typeof (AssemblyBuilder).GetField ("culture", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 349
 350                                 assembly_culture.SetValue (builder, culture);
 351                         } catch {
 352                                 base.SetCulture (culture, loc);
 353                         }
 354                 }
 355
 356                 public override void SetFlags (uint flags, Location loc)
 357                 {
 358                         try {
 359                                 if (assembly_flags == null)
 360                                         assembly_flags = typeof (AssemblyBuilder).GetField ("flags", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 361
 362                                 assembly_flags.SetValue (builder, flags);
 363                         } catch {
 364                                 base.SetFlags (flags, loc);
 365                         }
 366                 }
 367
 368                 public override void SetVersion (Version version, Location loc)
 369                 {
 370                         try {
 371                                 if (assembly_version == null)
 372                                         assembly_version = typeof (AssemblyBuilder).GetField ("version", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 373
 374                                 assembly_version.SetValue (builder, version.ToString (4));
 375                         } catch {
 376                                 base.SetVersion (version, loc);
 377                         }
 378                 }
 379         }
 380
 381         //
 382         // Reflection based references loader
 383         //
 384         class DynamicLoader : AssemblyReferencesLoader<Assembly>
 385         {
 386                 readonly ReflectionImporter importer;
 387
 388                 public DynamicLoader (ReflectionImporter importer, CompilerContext compiler)
 389                         : base (compiler)
 390                 {
 391                         paths.Add (GetSystemDir ());
 392
 393                         this.importer = importer;
 394                 }
 395
 396                 public ReflectionImporter Importer {
 397                         get {
 398                                 return importer;
 399                         }
 400                 }
 401
 402                 protected override string[] GetDefaultReferences ()
 403                 {
 404                         //
 405                         // For now the "default config" is harcoded into the compiler
 406                         // we can move this outside later
 407                         //
 408                         var default_references = new List<string> (8);
 409
 410                         default_references.Add ("System");
 411                         default_references.Add ("System.Xml");
 412 #if NET_2_1
 413                         default_references.Add ("System.Net");
 414                         default_references.Add ("System.Windows");
 415                         default_references.Add ("System.Windows.Browser");
 416 #endif
 417
 418                         if (RootContext.Version > LanguageVersion.ISO_2)
 419                                 default_references.Add ("System.Core");
 420                         if (RootContext.Version > LanguageVersion.V_3)
 421                                 default_references.Add ("Microsoft.CSharp");
 422
 423                         return default_references.ToArray ();
 424                 }
 425
 426                 //
 427                 // Returns the directory where the system assemblies are installed
 428                 //
 429                 static string GetSystemDir ()
 430                 {
 431                         return Path.GetDirectoryName (typeof (object).Assembly.Location);
 432                 }
 433
 434                 public override bool HasObjectType (Assembly assembly)
 435                 {
 436                         return assembly.GetType (compiler.BuildinTypes.Object.FullName) != null;
 437                 }
 438
 439                 public override Assembly LoadAssemblyFile (string fileName)
 440                 {
 441                         return LoadAssemblyFile (fileName, false);
 442                 }
 443
 444                 Assembly LoadAssemblyFile (string assembly, bool soft)
 445                 {
 446                         Assembly a = null;
 447
 448                         try {
 449                                 try {
 450                                         char[] path_chars = { '/', '\\' };
 451
 452                                         if (assembly.IndexOfAny (path_chars) != -1) {
 453                                                 a = Assembly.LoadFrom (assembly);
 454                                         } else {
 455                                                 string ass = assembly;
 456                                                 if (ass.EndsWith (".dll") || ass.EndsWith (".exe"))
 457                                                         ass = assembly.Substring (0, assembly.Length - 4);
 458                                                 a = Assembly.Load (ass);
 459                                         }
 460                                 } catch (FileNotFoundException) {
 461                                         bool err = !soft;
 462                                         foreach (string dir in paths) {
 463                                                 string full_path = Path.Combine (dir, assembly);
 464                                                 if (!assembly.EndsWith (".dll") && !assembly.EndsWith (".exe"))
 465                                                         full_path += ".dll";
 466
 467                                                 try {
 468                                                         a = Assembly.LoadFrom (full_path);
 469                                                         err = false;
 470                                                         break;
 471                                                 } catch (FileNotFoundException) {
 472                                                 }
 473                                         }
 474
 475                                         if (err) {
 476                                                 Error_FileNotFound (assembly);
 477                                                 return a;
 478                                         }
 479                                 }
 480                         } catch (BadImageFormatException) {
 481                                 Error_FileCorrupted (assembly);
 482                         }
 483
 484                         return a;
 485                 }
 486
 487                 public override Assembly LoadAssemblyDefault (string fileName)
 488                 {
 489                         return LoadAssemblyFile (fileName, true);
 490                 }
 491
 492                 Module LoadModuleFile (AssemblyDefinitionDynamic assembly, string module)
 493                 {
 494                         string total_log = "";
 495
 496                         try {
 497                                 try {
 498                                         return assembly.IncludeModule (module);
 499                                 } catch (FileNotFoundException) {
 500                                         bool err = true;
 501                                         foreach (string dir in paths) {
 502                                                 string full_path = Path.Combine (dir, module);
 503                                                 if (!module.EndsWith (".netmodule"))
 504                                                         full_path += ".netmodule";
 505
 506                                                 try {
 507                                                         return assembly.IncludeModule (full_path);
 508                                                 } catch (FileNotFoundException ff) {
 509                                                         total_log += ff.FusionLog;
 510                                                 }
 511                                         }
 512                                         if (err) {
 513                                                 Error_FileNotFound (module);
 514                                                 return null;
 515                                         }
 516                                 }
 517                         } catch (BadImageFormatException) {
 518                                 Error_FileCorrupted (module);
 519                         }
 520
 521                         return null;
 522                 }
 523
 524                 public void LoadModules (AssemblyDefinitionDynamic assembly, RootNamespace targetNamespace)
 525                 {
 526                         if (RootContext.Modules.Count == 0)
 527                                 return;
 528
 529                         foreach (var moduleName in RootContext.Modules) {
 530                                 var m = LoadModuleFile (assembly, moduleName);
 531                                 if (m == null)
 532                                         continue;
 533
 534                                 var md = importer.ImportModule (m, targetNamespace);
 535                                 assembly.AddModule (md);
 536                         }
 537                 }
 538
 539                 public override void LoadReferences (ModuleContainer module)
 540                 {
 541                         Assembly corlib;
 542                         List<Tuple<RootNamespace, Assembly>> loaded;
 543                         base.LoadReferencesCore (module, out corlib, out loaded);
 544
 545                         if (corlib == null)
 546                                 return;
 547
 548                         importer.ImportAssembly (corlib, module.GlobalRootNamespace);
 549                         foreach (var entry in loaded) {
 550                                 importer.ImportAssembly (entry.Item2, entry.Item1);
 551                         }
 552                 }
 553         }
 554 }